FACTORES QUE INFLUYEN EN LA ABUNDANCIA DE LARVAS DE COLEOPTERA: MELOLONTHIDAE CON IMPORTANCIA AGRÍCOLA EN LA REGIÓN PURHÉPECHA, MICHOACÁN, MÉXICO.

The influence of the environmental and management factors on the white grub complex in two localities at Purhepecha Region in the state of Michoacán, Mexico was studied. Maize fields at San Felipe are under extensive management, and maize fields at Uricho are under intensive management. Four factors that could influence on the distribution of the species of Coleoptera Melolonthidae were selected: i) soil, humidity and organic matter percentage, ii) fertility management, iii) biological, abundance of 10 species, iv) temperature and precipitation in the area. One matrix with information of 25 variables and eight sites was formed for each one of two localities. The information was analyzed by Detrended Correspondence Analysis. As part of the results we found that the variables that explain the grouping of the species of white grubs at the extensive system (San Felipe) are repose with free pasturing and minimum winter temperature with 62% of probability. While intensive system (Uricho) species grouping explained with 62% probability by the application of herbicides. The second variables in importance are organic matter and soil humidity percentage at 15 centimeter depth with 68.41% of probability. [ABSTRACT FROM AUTHOR]